<template>
  <div id="chart" style="width: 100%;height: 500px;"></div>
</template>
<script>
export default {
  data() {
    return {
      option: {
        title: {
          text: 'Referer of a Website',
          subtext: 'Fake Data',
          left: 'center'
        },
        tooltip: {
          trigger: 'item'
        },
        toolbox: {
          feature: {
            saveAsImage: {}
          }
        },
        legend: {
          orient: 'vertical',
          left: 'left'
        },
        series: [
          {
            name: 'Access From',
            type: 'pie',
            radius: '50%',
            data: [
              { value: 1048, name: 'Search Engine' },
              { value: 735, name: 'Direct' },
              { value: 580, name: 'Email' },
              { value: 484, name: 'Union Ads' },
              { value: 300, name: 'Video Ads' }
            ],
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      }
    }
  },
  methods: {
    generateChart() {
      this.$echarts.init(document.querySelector('#chart')).setOption(this.option)
    }
  },
  mounted() {
    this.generateChart()
  }
}
</script>